Silver source reduction mother liquor sedimentation method and silver powder preparation method

The invention provides a silver source reduction mother liquor sedimentation method and a silver powder preparation method, and the silver source reduction mother liquor sedimentation method comprises the following steps: D1, adding an auxiliary agent into a reduction mother liquor to form a mixed solution, the auxiliary agent is a mixture of one or more of ionic polyacrylamide, sodium polyacrylate, a cationic melamine polymer, a cationic dicyandiamide polymer and poly dimethyl diallyl ammonium chloride, and is used as a settling agent and an electrophoretic agent; and D2, introducing a direct-current electric field into the mixed solution, connecting the bottom layer of the mixed solution to an electric field positive electrode, connecting the upper layer of the mixed solution to an electric field negative electrode, electrifying and settling for 15 minutes, and then collecting a sediment. The invention aims to provide the sedimentation method for the silver source reduction mother liquor, and aims to improv